/Engine/Plugins/Experimental/PCG/Source/PCG/Public/PCGManagedResource.h
Releases resource if empty or unused. Returns true if the resource can be removed from the PCG component
virtual bool ReleaseIfUnused ( [TSet](API\Runtime\Core\Containers\TSet)< [TSoftObjectPtr](API\Runtime\CoreUObject\UObject\TSoftObjectPtr)< [AActor](API\Runtime\Engine\GameFramework\AActor) >> & OutActorsToDelete )